Comment by fosley

This ability is cast by Festergut in the Plagueworks wings of Icecrown Citadel. It is cast on the active tank every 10 seconds, and grants a 10% damage bonus per stack. However, if the tank reaches 10 stacks, he will instantly die, regardless of health, and do massive raid-wide damage, likely causing a wipe if you're level 80. As such, the second tank needs to taunt at 9 stacks to prevent this problem. The debuff lasts 100 seconds, so you'll want to taunt as soon as the other tank gets his 9th stack to give yourself as much breathing room as possible.

If you've got a group of 90's, it won't be a problem. If you're trying to solo Festergut, you have about 2 minutes 13 seconds (I beat him in 2:13 and the previous Gastric Bloat was 10 seconds prior), which is probably somewhat dependent on luck. I did it on a 491 Blood DK at 69.2k dps, so any current-geared character probably won't have much trouble, but if you just hit 90, you might be out of luck without a friend.

Edit: I did that on 10N. On 25N with the 6.0 damage boost, I'm doing 129k in frost spec and only got him to 28%.

Edit 2: On 25N on my shadow priest I killed him at 8 stacks in 1:42 doing 195k dps. Basic math says around 160k is needed for 25N, and 205k is needed for 25H, assuming Wowhead health numbers are accurate and Gastric Explosion hits at 2:10. I was unable to get anywhere near that on 25H because I kept getting hit with Malleable Goo, which may be a L2P issue. On 25N it never came out.